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2.
a transparent section of an automobile roof that can be propped open, removed entirely, or remain fixed within the roof.
i have a moonroof in my car
by Archie L December 24, 2007
 
1.
A female with a particularly succulent lower back/gluteus maximus region.
"Look at the moonroof on that bird over there."
by Moonroof1 August 12, 2012